Can a defendant appeal from a sentence imposed from a no contest plea?

Pursuant to People v. Wende (1979) 25 Cal.3d 436, appellant appeals from the sentences imposed in three separate cases in which he had entered pleas of no contest consistent with a plea agreement negotiated with the prosecution. The trial court granted his request for a certificate of probable cause to contest the validity of his pleas, but appellant never filed a motion seeking to withdraw any of his pleas. We affirm the judgments rendered and sentences imposed in all three cases.